You can put this solution on YOUR website! Find the value of two numbers if their sum is 70
a + b = 70
and their difference is 36.
a - b = 36
:
Use elimination on these two equations
a + b = 70
a - b = 16
------------Addition eliminates b, find a
2a + 0 = 86
a = 86/2
a = 43
Find b
43 + b = 70
b = 70 - 43
b = 27
:
:
Check
43 - 27 = 16
Think of the two numbers on a number line. If you start at the larger number and add the smaller, you end up at 70; if you start at the larger and subtract the smaller, you end up at 36. Logical analysis tells you the larger number is halfway between 36 and 70.
